Due to individual differences and different characteristics of drugs, there is no Betaloc or Atenolol which is better. Betaloc, i.e. metoprolol tartrate, belongs to the same category of beta-blockers as atenolol and has similar medicinal effects, with some differences between the two. 1. Bioavailability is different: Metoprolol tartrate will be partially absorbed by the liver and intestinal mucosa before it enters the blood circulation, so the bioavailability is relatively low. Atenolol has relatively higher bioavailability. 2. Different mode of action: Atenolol is a water-soluble β-blocker, which is not easy to cross the blood-brain barrier. Metoprolol tartrate is a fat-soluble β-blocker, which can easily pass the blood-brain barrier. 3. Metabolism and excretion are different: Metoprolol tartrate is mainly metabolized in the liver. Atenolol is excreted through the kidneys. Metoprolol tartrate is used in the treatment of hypertension, angina pectoris, myocardial infarction, etc. Fatigue, headache, dizziness and other adverse effects are common, cardiogenic shock. It is contraindicated in patients with sick sinus node syndrome and others. Atenolol is mainly used in the treatment of hypertension, angina pectoris, myocardial infarction, etc. During the treatment, there can be dizziness, cold limbs, fatigue, fatigue, gastrointestinal discomfort and other adverse reactions, Ⅱ – Ⅲ degrees of heart block, cardiogenic shock is prohibited. Both Betalucil and Atenolol are prescription drugs, and you need to listen to your professional doctor’s advice on the specific choice of drugs.